Basic diff command

1 files changed, 81 insertions, 0 deletions

diff --git a/src/bin/git-diff-autosave.rs b/src/bin/git-diff-autosave.rs
new file mode 100644
index 0000000..63aa130
--- /dev/null
+++ b/src/bin/git-diff-autosave.rs
@@ -0,0 +1,81 @@
+use auth_git2::GitAuthenticator;
+use git_autosave::{Config, authenticate::Inquirer, inquire::AutosaveFilters};
+use git2::{DiffOptions, RemoteCallbacks, Repository};
+
+fn main() -> Result<(), anyhow::Error> {
+	let all_users = std::env::args().any(|arg| arg == "--all-users");
+	let all_branches = std::env::args().any(|arg| arg == "--all-branches");
+	let all_devices = std::env::args().any(|arg| arg == "--all-devices");
+	let anytime = std::env::args().any(|arg| arg == "--anytime");
+
+	let repository = Repository::discover(".")?;
+	let repo_id = git_autosave::repository_id(&repository)?;
+	let signature = repository.signature()?;
+	let branch = git_autosave::utils::current_branch(&repository)?;
+	let earliest_time = repository.head()?.peel_to_commit()?.time();
+
+	let gitconfig = repository.config()?;
+	let config: &'static _ = Box::leak(Box::new(Config::load()?));
+	let auth = GitAuthenticator::new().set_prompter(Inquirer(config));
+	let mut callbacks = RemoteCallbacks::new();
+	callbacks.credentials(auth.credentials(&gitconfig));
+	git_autosave::fetch_autosaves(&repository, callbacks)?;
+
+	let autosaves = git_autosave::autosaves(&repository)?;
+	let autosaves = git_autosave::inquire::filter_autosaves(
+		autosaves,
+		AutosaveFilters {
+			signature: &signature,
+			branch: &branch,
+			earliest_time,
+			repo_id: &repo_id,
+			all_users,
+			all_branches,
+			anytime,
+			all_devices,
+		},
+	)
+	.collect::<Vec<_>>();
+
+	if autosaves.is_empty() {
+		eprintln!("ERROR: There are no available autosaves for the given filters.");
+		if !all_users || !all_branches || !anytime {
+			eprintln!(
+				"hint: Use --all-users, --all-branches, --all-devices, or --anytime to include more options."
+			);
+		}
+		std::process::exit(1);
+	}
+
+	let autosave = git_autosave::inquire::select_autosave(autosaves, all_branches, all_users)?;
+	let autosaved_commit = repository.find_commit(autosave.commit_id)?;
+	let workdir = repository.find_tree(git_autosave::utils::workdir_to_tree(&repository)?)?;
+	let new_tree = repository.find_tree(git_autosave::utils::merge_commit_with_tree(
+		&repository,
+		&autosaved_commit,
+		&workdir,
+	)?)?;
+	let diff = repository.diff_tree_to_tree(
+		Some(&workdir),
+		Some(&new_tree),
+		Some(DiffOptions::new().include_unmodified(false).patience(true)),
+	)?;
+	diff.print(git2::DiffFormat::Patch, |_, _, line| {
+		let origin = match line.origin_value() {
+			git2::DiffLineType::Context => " ",
+			git2::DiffLineType::Addition => "+",
+			git2::DiffLineType::Deletion => "-",
+			git2::DiffLineType::ContextEOFNL => "=",
+			git2::DiffLineType::AddEOFNL => ">",
+			git2::DiffLineType::DeleteEOFNL => "<",
+			git2::DiffLineType::FileHeader => "",
+			git2::DiffLineType::HunkHeader => "",
+			git2::DiffLineType::Binary => "",
+		};
+		let content = String::from_utf8_lossy(line.content());
+		println!("{origin}{content}");
+		true
+	})?;
+
+	Ok(())
+}